The explanation to your first question can be found in the image below.
Generally, designers do not sell designs to other designers. They sell them to webmasters - small, medium and large website owners, website entrepreneurs and enthusiasts. In order for our marketplace to eventually be more productive and produce higher profits for sellers, we need to bring more buyers - that other part of the equation. These
buyers do not search for a "freelance forum" or a "web design forum", they search for a "webmaster forum" to discover pools of other entrepreneurs.
If you search for a "webmaster forum" today, you are only going to see 4-5 quality sites at the top with remaining listed forums being a lot smaller than the TalkFreelance community. Even without the word "webmaster" in our domain, with proper search engine targeting we have a decent shot at attaining a higher ranking position and consequently receiving a larger exposure.
By the way, v7n and DigitalPoint (perhaps the largest webmaster forum out there) also do not have the word "webmaster" in its domain name. You just know that you are on v7n or DigitalPoint websites when you are on them.
Regardless, we will always rank well for "TalkFreelance".
As far as your second question, I'll ask Gaz to comment.